Air conditioning unit for vehicle

Details Air conditioning unit for vehicle Air conditioning unit for vehicle

1986-04-28

1987-09-08

Tapolcai, William E.

Refrigeration

Automatic control

Refrigeration producer

417269, 417295, F25B 3100, F25B 4104

Patent

active

046915265

ABSTRACT:
An air conditioning unit for cooling and dehumidifying a passenger room of a vehicle including a reciprocatory piston type refrigerant compressor having a refrigerant suction chamber, a compressed refrigerant discharge chamber, and an independent drive chamber for a drive mechanism to reciprocate compressor piston, a condenser, an expansion valve, an evaporator for thermal exchange, and an evaporating pressure control valve adjustably changing a fluid communication between the evaporator and the suction chamber of the compressor in response to a change is a cooling load. The air conditioning unit further includes a fluid bypass passageway providing a constant fluid communication between the evaporator and the drive chamber of the compressor regardless of the change in the cooling load so that a part of a lubricant containing refrigerant is always introduced into the drive chamber.

REFERENCES:
patent: 3365905 (1968-01-01), Barbier
patent: 4366834 (1983-01-01), Hanson et al.
patent: 4522567 (1985-06-01), Kato et al.

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